Well-casing puller.



M. vv SMHH. WELL CASING FULLER.

APPLICATION FILED M'AYS, 1918.

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Patented Oct. 22, 1918.

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MARION W. SMITH, F TULSA, OKLAHOMA.

WELL-casina PULLER.

Specification of Letters Patent.

Patented Oct. 22, 1918.

Application filed May 3, 1918. Serial No. 232,279.

ers; and I do hereby declare the following to be a full, cle-ar, andeXact description of the invention, such as will enable others skilledin the art tor-which it appertains to make and use the same. Y

This invention relates to improvements in grapples and particularly tograpples used in pulling well casings out of wells.

One object of the present invention is to provide a novel and improveddevice of this character which is simple in construction and by means ofwhich casings of different sizes can be readily pulled from the wells.

Another object is to provide a novel and improved device of thischaracter which is easy to operate and which is eective in its grip onthe casing.

A further object is to provide a novel and improved device of thischaracter whereby a single section of casing, or the lowermost sectionof a series, can be gripped at the lower end without danger of thegripping members biting in the sides of the well and preventing upwardmovement of the grapple.

A still further object is to provide a device of this character wherebythe proper adjustment can be made before the device is lowered into thecasing, thus insuring the proper grip on the casing without danger oftoo deep penetration of the gripping members into the casing section.

Other objects and advantages will be apparent from the followingdescription when taken in connection with the accompanying drawing.

Tn the drawing:

Figure 1 is an elevation of my improved well casing grapple shown withinthe casing, and in operative or gripping position, the casing beingshown in section.

Fig. 2 is a similar elevation showing the gripping members in elevatedposition.

Fig. 3 is vertical sectional view taken on the line 3-3 of Fig, 1.

Fig. el is a horizontal sectional view taken on the line lr-4 of Fig. 1.

Referring particularly to the accompanying drawing, represents thelowermosti section of the well casing and 11 the next WV. SMITH, a y

section above, the latter being the one upon which the device is shownas operating, in thev various figures of the drawing.

A vertical rod 12 is disposed wit-hin the center of the casing andhassecured to the lower end thereof,v immediately above the point 18thereof, a plate 14 carrying the ver tical pairs of eye-bolts 15 onitsupper face. Disposed between each pair of eye-bolts is the lowerapertured end of one of the gripping members 16, there being four ofsuch members, as clearly shown in the drawing. The upper end of the rodis provided with a ring 17 to which is connected the lower end of acable 18, said cable being connected to any suitable lifting device atits upper end. The free ends of the gripping members are cut offobliquely to provide the biting points 19 which are adapted to engagewith the inner face of the lower end of the casing section to be removedfrom the Well.

ln the upper portionof the rod 12 there are formed the longitudinalseries of openings 20 for reception of a pin 21 carried by a verticallyslidable collar 9.2 disposed on the rod. Also slidable on the rod, anddisposed above the collar, is a ring 23. To this ring, and to the ,outerend portions of the gripping members are connected the chains or otherflexible elements 24, which serve to prevent too far movement outward ofthe said gripping members. This is particularly advantageous when asingle casing section is to be pulled from the well, for the reason thatthe gripping members are prevented from biting into the walls of thewell when the device drops below the lower end of said section.

It will be noted that the collar 22 serves as a stopV to prevent orlimit the downward movement of the ring 23, on the rod.

Connected to the ring 23 is a cord or line 25 by means of which the saidring may be kmoved upwardly on the rod to release the gripping lmembersfrom engagement with the casing, and also to withhold the grippingmembers out of engagement with the interior face of the casing when thedevice is being lowered thereinto.

By reason of the adjustability of the collar the proper spread of thegripping members can be obtained prior to lowering the device in thecasing.

What is claimed is: 1. A well casing puller including an opel'ating.rod, gripping members movably oarried by the rod, a slidable' member onthe rod, flexible connections between the slidable kmember and thegripping members, and an Y vdripping members, anda collar slidably ad-Justable on the rod to limit the movement of the ring and to limit theoutward pivotal movement ofV the gripping members.

3. A. well easing puller including an operating rod having alongitudinal series of Copies of this' patent may be obtained for vecents each, by addressingv the Commissioner of Patents,

openings in the upper portion thereof, Va plate iXed on the lower end ofthe rod, easing gripping arms pivotally Carried by the L plate, a ringslidably mounted on the rod, chains connected to the arms and to thering, and a collar slidable on the rod and having a removable pin forengagement in the openings of the rod, whereby the ring is limited inits movement to limit the outward swingin' movement of the grippingarms.

n testimony whereof, I affix my signature in the presence of twowitnesses.

MARION W. SMITH.

Witnesses:

JN0. Rowe, GEO. CooKs.

g Washington, ZD. C.

